[OKGIS] Oklahoma County .shp File Projected in Miles

[dlowther at coordinatesolutions.com]

Neil,

 

Maybe someone else has a different understanding, but as far as I know the
units of a lat/long projection would be decimal degrees - not feet or miles.
You might configure your GIS to measure in feet or miles, but this would be
a translation that the software does from the underlying projection unit,
which should be decimal degrees for lat/long. 

 

I you want to email the shapefile to me off list (make sure you don't reply
to the list because it is likely to be a large file) I'd be happy to take a
look and see if I can help you work through it. We can continue the
discussion on list.

 

David Lowther

 

Coordinate Solutions, Inc.

501 N.E. 15th Street

Oklahoma City, OK 73104

405.246.9396 (Voice)

405.227.0781 (Fax)

www.coordinatesolutions.com

 

  _____  

From: okgis-bounces at gis.gis.ou.edu [mailto:okgis-bounces at gis.gis.ou.edu] On
Behalf Of Neil A. Gray
Sent: Monday, August 07, 2006 10:39 AM
To: okgis at gis.gis.ou.edu
Subject: [OKGIS] Oklahoma County .shp File Projected in Miles

 

The City of Nichols Hills has recently purchased a ENS (Emergency
Notification System) often referred to as a reverse 9-1-1 system, which
allows the City to contact residents by telephone, pager, cell phone, etc.
in the event of emergencies. This system uses ESRI-based software to allow
operators to select notification areas by drawing a circle or square on a
map. The company selling the product has requested that the City provide the
GIS data to operate this feature. We supplied them with data for Oklahoma
County that was a centerline file in a .shp format as per their
instructions.

 

Now the ENS company states that the data we supplied them is projected in
LAT/LONG feet and they need the data projected in LAT/LONG miles. Does
anyone have this data available or have the ability to re-project our data.
We do not have a GIS department or the ESRI products to make this conversion
ourselves. The format for the data is as follows:

 

----------

 

Projection: NAD_27 or NAD_83, projection in Lat/Long "MILES"
Although other projections can be viewed and selections can be made from
them, there is functionality that will be lost if the above stated
projection does not match.

 

Required: Street or Centerline file in a .shp format.  This centerline file
should contain standard geocoding data fields such as:
L_F_ADD (From Left Address 'Left Low Address')
R_F_ADD (From Right Address 'Right Low Address')
L_T_ADD (To Left Address ' Left Low Address')
R_T_ADD (To Right Address 'Right High Address')
Prefix (Street Name Prefix) ie:  "W" 42snd Street
Name (Street Name) ie: 4700 "Vincent" St South
Type (Street Type) ie: 4700 Vincent "St" South
Suffix (Street Name Suffix) ie: 4700 Vincent St "South"
ZipL (Zip Code on left side of street)
ZipR (Zip Code on right side of street)
**Field names do not need to be exact.  Zip fields, as well as the prefix
and suffix fields, are optional, although very useful in ensuring optimal
accuracy.

 

Additional Layers (Optional):  Layers such as hydrology, parks, railroads,
airports, highways, etc. may be helpful in creating a more visually
appealing project, with useful points of reference.  If you are not sure
which layers can/should be used, it is better to submit many layers, which
will be used at the discretion of the Avtex representative creating the
project.

------------

 

Does anyone have a copy of Oklahoma County data in this projection, or have
a suggestion on what we should do?

 

 

Neil Gray

City of Nichols Hills

ngray at nicholshills.net

405-879-8870

 

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